Fix overflow:overlay scrollbar width for paint.

third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp

Index: third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp b/third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp
index b0a03cd8a8a1bbcf450bb1bfab2ac8676178243f..f7c18289dbad3fb40878d56939c6d5562100c300 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp
+++ b/third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp
@@ -635,7 +635,7 @@ float ScrollableArea::pixelStep(ScrollbarOrientation) const {
 
 int ScrollableArea::verticalScrollbarWidth(
     OverlayScrollbarClipBehavior behavior) const {
-  DCHECK_EQ(behavior, IgnoreOverlayScrollbarSize);
+  DCHECK_EQ(behavior, IgnorePlatformOverlayScrollbarSize);
   if (Scrollbar* verticalBar = verticalScrollbar())
     return !verticalBar->isOverlayScrollbar() ? verticalBar->width() : 0;
   return 0;
@@ -643,7 +643,7 @@ int ScrollableArea::verticalScrollbarWidth(
 
 int ScrollableArea::horizontalScrollbarHeight(
     OverlayScrollbarClipBehavior behavior) const {
-  DCHECK_EQ(behavior, IgnoreOverlayScrollbarSize);
+  DCHECK_EQ(behavior, IgnorePlatformOverlayScrollbarSize);
   if (Scrollbar* horizontalBar = horizontalScrollbar())
     return !horizontalBar->isOverlayScrollbar() ? horizontalBar->height() : 0;
   return 0;